David l



filming /zz-/f//e/jazfia/ a, JWM, ayf,

PL PEIERS, PNGTWLITHOGRAPHER. WASHINGTON. D C.

lnit fte-tet @anni fitte.

IMPROVEMENT IN RIDDLES FOR SAND-WASHERS.

fdige tlpmle atmet tu n ttcse tcttets gilteut ma mating pat nf tigesamt.

TO ALL WHOM IT MAY GONCERN:

Be it known that I, DAVID L. FURNIER, of Rostraver, in the county ot'Westmoreland, and State of Pennsylvania, have invented a new and usefulImprovement in Riddles for Sand-Washing; and I do hereby declare thefollowing to be a full, clear, and exact description of the same,reference Abeing had to the accompanying drawings, in which- Figure lis' a plan of my riddle.

Figure 2 is a vertical sectional elevation of the same.

That others may understand my invention, I will particularly describeit.

A is the hed or frame which supports my riddle, and receives the sandand water as they pass through the same. In the centrall part of the bedA is the trough B, and at one end the discharge chute C. At each end isa pillow-block, D E, to support the bearings of the shaft F, upon whichrevolves the riddle. This last is composed of two hubs, G H, withradiating spokes, the blades I I, and the heads J K. Over the blades Iis stretched a screen ot' wire cloth of' proper mesh, and around theinner side, secured also to. the inner edges of the blades, is anotherscreen of similar wire cloth. A web, P, connects the spokes radiatingfrom the hub H, nearly extending to their outer extremities, so that a.small space is left around said web, but between the two screens,overwhich gravel may pass to he discharged at the tail of the machine. Thespokes from the hub I-I are very wide in the direction of thelength ofthe screen, and join the inner surface of the head K, and't'hus thecompartments formed by the blades and the screens are continued over theweb and down to the tail spout L, which encircles the opening throughthe head K and conducts all the sand and gravel which cannot passthrough the outer screen into the discharge chute C. At the head of themachine is the hopper M, into which a stream of water constantly poursfrom some convenient reservoir, and'into which the foul sand isshovellcd. Also within the chutc M, and secured upon the shaft F, arethe stirring arms N, which thoroughly disintegrate the earthy masses ofsand, &c., as they come from the shovel and before they pass down intothe interior of the riddle. Along the outer side of the, riddle, andsecured to the edges of the blades, are the wings O, which dip into thetrough to its bottom and keep in continual agitation the sand and watertherein.

The operation of mymachine is very simple. It has been found impossiblet0 clean sand from its earthy admixture except by constant agitation inrunning water, which will take up and hold in suspension the earthyparticles and gradually carry them away over the tail. VWhen sand mixedwith earthy matter is thrown'upon a screen upon which a stream of wateris pouring, the action is confined to that portion of the screen uponwhich the water actually inipinges, and the remainder of screen surfaceis covered with an unmoving coating of wet sand. With my device thisisperfectly obviated, because the entire surface of the screen is passedthrough the water in thertrough B, at every revolution, and there can beno clogging. When the earthy sand is shovellefl into the chute or hopperM, it is broken up and disintegrated by the arms N N, and is washed downinto the Y interior of the riddle, the-lower side of which is alwaysimmersed in water. As the riddle is revolved the earthy j particlesaregradually separated from the sand and become suspended in the water. Allof the sand except 'I very coarse gravel will pass through the innermostscreen, and that portion of the sand which is not above ther standarddegree of coarseness will pass through the outer screen also into thetrough. That portion which istoo coarse to pass through the meshes ofthe outer screen will, by the slightly inclined position of theyriddle',

" and its constant revolution, be gradually moved to the tail end, andthere discharged over the web and into'- the chute C. The trough isalways full of water to a point above the edge of the chute C, so thatthere is aV constant overflow at that part into said chute, and as theriddle revolves the wings continually move the sandand earthy matterwhich have passed through both inner and outer screen, so that they areconstantlyy exposed to the action of flowing water, and the earthyparticles are very effectually taken up and removed, While the cleansand is little by little removed by the wings O, and thrown over theside of the bed A. The riddle may be caused to revolve by any convenientmotive power.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is A hollow screen or riddle revolving on an axis,with one portion always immersed in a vessel through which a stream ofwater constantly flows, when Vsaid riddle receives the earthy sand intoits interior at one end and discharges the coarser particles over a tailchute at the other end, as set forth and described.

t v 2 i In combination with aI hollow revolving riddle, constructedsubstantially as described, and revolving in a. watertrough B, the chuteM and stirrers N N, for the purpose set forth.

In combination with a. hollow'revolving riddle, constructedsubstantially as described, the web P, and tail spout L, for the purposeset forth.

In combination with a, hollow revolving riddle, constructedsubstantially :is described, the wings O O upon its outer side to:tgitate and remove the sund from the trough, as set forth.

The combination of the hollow revolving and bed-frame A, provided withthe trough B, and waste ohute, constructed and arranged as set forth anddescribed.

DAVID L. FURNIER.. litnesses:

JN0. C. CUNNINGHAM,

DAVID WILSON.

